PCI: Enable upstream bridges even for VFs on virtual buses
Previously we enabled the upstream PCI-to-PCI bridge only when
"dev->bus->self != NULL". In the case of a VF on a virtual bus, where
"bus->self == NULL", we didn't enable the upstream bridge.
This fixes that by enabling the upstream bridge of the PF corresponding to
the VF.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index ac40f90..d3ed931 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1148,12 +1148,12 @@
static void pci_enable_bridge(struct pci_dev *dev)
{
+ struct pci_dev *bridge;
int retval;
- if (!dev)
- return;
-
- pci_enable_bridge(dev->bus->self);
+ bridge = pci_upstream_bridge(dev);
+ if (bridge)
+ pci_enable_bridge(bridge);
if (pci_is_enabled(dev)) {
if (!dev->is_busmaster)
@@ -1170,6 +1170,7 @@
static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags)
{
+ struct pci_dev *bridge;
int err;
int i, bars = 0;
@@ -1188,7 +1189,9 @@
if (atomic_inc_return(&dev->enable_cnt) > 1)
return 0; /* already enabled */
- pci_enable_bridge(dev->bus->self);
+ bridge = pci_upstream_bridge(dev);
+ if (bridge)
+ pci_enable_bridge(bridge);
/* only skip sriov related */
for (i = 0; i <= PCI_ROM_RESOURCE; i++)